CN102958247A - Power converter and dimmable solid-state lighting device applying same - Google Patents
Power converter and dimmable solid-state lighting device applying same Download PDFInfo
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- CN102958247A CN102958247A CN2012102957314A CN201210295731A CN102958247A CN 102958247 A CN102958247 A CN 102958247A CN 2012102957314 A CN2012102957314 A CN 2012102957314A CN 201210295731 A CN201210295731 A CN 201210295731A CN 102958247 A CN102958247 A CN 102958247A
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- 239000003990 capacitor Substances 0.000 claims description 16
- 238000004146 energy storage Methods 0.000 claims description 14
- 230000003287 optical effect Effects 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 22
- 238000004891 communication Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 206010065929 Cardiovascular insufficiency Diseases 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/38—Switched mode power supply [SMPS] using boost topology
Abstract
A power converter and a dimmable solid-state lighting device using the same are provided. The invention relates to a power converter, which can generate direct current output voltage by a rectifier receiving rectified voltage converted by the output of a dimmer in a non-isolated switching type boosting mode and is used for providing the direct current output voltage for at least one solid-state light-emitting element.
Description
Technical field
The present invention relates to the power supply changeover device of a kind of tool direct current output, particularly relate to the boost solid-state lighting device of (non-isolated switching boost) power supply changeover device of the non-isolation suitching type of a kind of use.
Background technology
Dimmer (dimmer) is for a kind of in order to adjust the control circuit of lighting device (for example incandescent lamp bulb) brightness.Figure 1A shows a kind of functional-block diagram of light adjusting system, and wherein dimmer 10 and bulb 12 are connected to the two ends of AC power 14 after connecting.The circuit diagram of the dimmer 10 of Figure 1B illustration Figure 1A consists predominantly of two end communication elements (DIAC) 100 and three end communication elements (TRIAC) 102.When two end communication elements 100 reached conducting (breakover) voltage, the electric conduction that produces failed to be convened for lack of a quorum and triggers three end communication elements 102 and make its conducting, thereby makes bulb 12 luminous.The user can be by adjustable resistor VR to adjust the brightness of bulb 12.
Fig. 2 A shows the functional-block diagram of another kind of light adjusting system, and wherein the two ends of AC power 14 are connected to two power ends of dimmer 10, and two load ends of dimmer 10 then are connected to bulb 12.The circuit diagram of the dimmer 10 of Fig. 2 B illustration Fig. 2 A mainly also is to include two end communication elements 100 and three end communication elements 102, and its class of operation is similar to the dimmer 10 of Figure 1B.
Above-mentioned switch type power converter needs to use the capacitor of high capacitance, in order to obtain the waveform near direct current after bridge rectifier.Yet high capacitance is so that solid-state light emitting element becomes a kind of non-resistance device, and this is different from the resistance-type device is main conventional illuminator (for example incandescent lamp bulb or based on halogen bulb).When switch type power converter directly applies to solid-state lighting device (or non-resistance-type lighting device), the dimmer 10 of its collocation is transferred when low level, come driving power transducer and solid-state light emitting element because obtaining enough voltage, cause easy generation flicker.Moreover the capacitor of the high capacitance that uses for stable DC voltage is provided can cause and produce phase difference between voltage and the electric current, so that power factor (power factor) reduces.
Therefore, need the light adjusting system that proposes a kind of novelty badly, avoid scintillation except allowing power supply changeover device be able to normal running, and can improve power factor and reach real energy saving effect.
Summary of the invention
The object of the invention is to, a kind of power supply changeover device that uses non-isolation suitching type to boost is provided, not only can improve power efficiency, and can provide enough operating voltages accurate position, make solid-state light emitting element be able to normal running.Another object of the present invention is to reduce non-resistance (or electric capacity) effect, use so that solid luminous device improves power factor (PF) and reduces scintillation.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to the non-isolation suitching type booster power transducer that the present invention proposes, it comprises: switch controller; The energy storage element, its first end is connected to the input of this power supply changeover device, and the second end of this energy storage element is connected to the switch terminal of this switch controller; Unidirectional switch elements is connected between the output of the second end of this energy storage element and this power supply changeover device; And load capacitor, be connected between this output and the shared node; Wherein when this switch controller was in conducting state, the switch terminal of this switch controller electrically conducted to this shared node, and this commutating voltage charges to this energy storage element via this input; When this switch controller was in off-state, it is electrically isolated that the switch terminal of this switch controller and this are shared node, and this energy storage element discharges to this solid-state light emitting element via this unidirectional switch elements.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid power supply changeover device, wherein this energy storage element comprises inductor.
Aforesaid power supply changeover device, wherein this unidirectional switch elements comprises a diode.
Aforesaid power supply changeover device, wherein should share node is ground or power supply.
Aforesaid power supply changeover device, wherein this switch controller comprises oscillator (OSC) or the power-supply controller of electric (PMW IC) of deciding frequency or the output of frequency conversion waveform.
Aforesaid power supply changeover device, wherein this switch controller also comprises power end, is coupled to this output, with the operating voltage of this output voltage as this switch controller.
The object of the invention to solve the technical problems also realizes by the following technical solutions.According to the method that tunable optical solid-state lighting device direct voltage is provided that the present invention proposes, it comprises and utilizes aforesaid power supply changeover device output dc voltage.
The object of the invention to solve the technical problems realizes in addition more by the following technical solutions.According to the tunable optical solid-state lighting device that the present invention proposes, it comprises: rectifier receives the output of dimmer and is converted into commutating voltage; At least one solid-state light emitting element; And aforesaid power supply changeover device, receive this commutating voltage with output dc voltage, in order to offer this solid-state light emitting element.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid solid-state lighting device, it also comprises capacitor, is connected between the output and shared node of this rectifier.
Aforesaid solid-state lighting device, it also comprises current-limiting protection device, places between this solid-state light emitting element and the shared node.
Aforesaid solid-state lighting device, wherein this current-limiting protection device is the variable restriction protective device.
Aforesaid solid-state lighting device, wherein this current-limiting protection device is instant current-limiting protection device or average formula current-limiting protection device.
Aforesaid solid-state lighting device, wherein should share node is ground or power supply.
Aforesaid solid-state lighting device, wherein this solid-state light emitting element is light-emitting diode, Organic Light Emitting Diode or polymer LED.
The present invention compared with prior art has obvious advantage and beneficial effect.By technique scheme, power supply changeover device of the present invention and the tunable optical solid-state lighting device of using this power supply changeover device can reach suitable technological progress and practicality, and has an extensive value on the industry, it has at least the power supply changeover device of allowing and is able to normal running and avoids scintillation, and can improve the advantage that power factor reaches real energy saving effect.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above and other purpose of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and the cooperation accompanying drawing, be described in detail as follows.
Description of drawings
Figure 1A shows a kind of functional-block diagram of light adjusting system.
The circuit diagram of the dimmer of Figure 1B illustration Figure 1A.
Fig. 2 A shows a kind of functional-block diagram of light adjusting system.
The circuit diagram of the dimmer of Fig. 2 B illustration Fig. 2 A.
Fig. 3 A shows the block diagram of the light adjusting system of the embodiment of the invention.
Fig. 3 B shows the block diagram of another light adjusting system of the embodiment of the invention.
Fig. 4 shows the thin section block diagram of the solid-state lighting device of the embodiment of the invention.
Fig. 5 A shows the thin section circuit diagram of the solid-state lighting device of the embodiment of the invention.
Fig. 5 B show commutating voltage, output voltage and sense terminal electric current signal waveform.
The electric current of Fig. 5 C demonstration sense terminal SS and the voltage of switch terminal SW, the local waveform amplification of electric current.
Fig. 6 shows the thin section circuit diagram of the solid-state lighting device of another embodiment of the present invention.
Fig. 7 A shows the thin section circuit diagram of the solid-state lighting device of further embodiment of this invention.
Fig. 7 B shows the thin section circuit diagram of the solid-state lighting device of yet another embodiment of the invention.
[main element symbol description]
10: 100: two end communication elements (DIAC) of dimmer
102: three end communication elements (TRIAC) 12: bulb
14: AC power 30: AC power
32: dimmer 34: solid-state lighting device
340: rectifier 3401: bridge rectifier
3403: capacitor 342: power supply changeover device
3421: switch controller 3423: inductor
3425: diode 3427: load capacitor
3429: current-limiting protection device 3430: the variable restriction protective device
344: solid-state light emitting element 36: dotted line
VR: adjustable resistor P, Q: node
Vin: input/commutating voltage Vout: output/output voltage
SW: switch terminal PW: power end
SS: sense terminal Iss: the electric current of sense terminal
Vsw: the voltage Isw of switch terminal: the electric current of switch terminal
Vcc: power supply Vp: peak value
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, the power supply changeover device that foundation the present invention is proposed and the tunable optical solid-state lighting device of using this power supply changeover device, its embodiment, structure, feature and effect thereof are described in detail as follows.
Fig. 3 A shows the block diagram of the light adjusting system that comprises tunable optical solid-state lighting device of the present invention.In the present embodiment, light adjusting system comprises AC power 30, dimmer 32 and solid-state lighting device 34.Wherein, dimmer 32 is connected to the two ends of AC power 30 with after solid-state lighting device 34 is connected.In Fig. 3 A, dotted line 36 lefts of connected node P, Q can represent a light fixture (lamp holder) that is electrically connected to AC power 30, be provided with traditional interchange dimmer 32(dimmer 10 as shown in Figure 1B on it), the dotted line 36 right-hand solid-state illumination bulbs (that is solid-state lighting device 34) that represent, it can be made as conventional incandescent bulb shape, on the lamp socket (socket) that is spun on light fixture.Fig. 3 B shows the block diagram of another light adjusting system of the embodiment of the invention.In the present embodiment, light adjusting system also is to comprise AC power 30, dimmer 32 and solid-state lighting device 34.Wherein, after dimmer 32 and solid-state lighting device 34 were in parallel, dimmer 32 was connected to the two ends of AC power 30.
Fig. 4 shows the thin section block diagram of the tunable optical solid-state lighting device 34 of the embodiment of the invention.In the present embodiment, solid-state lighting device 34 comprises rectifier 340, non-isolation (non-isolated) suitching type boost (switching boost) power supply changeover device 342 and at least one solid-state light emitting element 344.Wherein, rectifier 340 receives the output of dimmer 32 and is converted into rectification (rectified) voltage Vin, non-isolation suitching type booster power transducer (abbreviation power supply changeover device) 342 receives commutating voltage Vin to produce output voltage V out, in order to offer solid-state light emitting element 344.
Fig. 5 A shows the thin section circuit diagram of the solid-state lighting device 34 of the embodiment of the invention.In the present embodiment, rectifier 340 comprises bridge rectifier 3401, also can be connected the capacitor 3403 of little capacitance between its output and the ground, in order to resisting the usefulness of electromagnetic interference (EMI), with rectifying and wave-filtering without relating to.Solid-state light emitting element 344 can be light-emitting diode (LED), Organic Light Emitting Diode (OLED) or polymer LED (PLED), but is not limited to this.The power supply changeover device 342 of present embodiment mainly comprises switch controller 3421, inductor 3423, diode 3425 and load capacitor 3427.Switch controller 3421 has with lower node: be coupled to sense terminal SS, the switch terminal SW of input Vin and be coupled to the power end PW of output end vo ut; Inductor 3423 is as the energy storage element, and its first end is connected to the input Vin of power supply changeover device 342, and the second end of inductor 3423 then is connected to the switch terminal SW of switch controller 3421, and is connected to an end of diode 3425.Diode 3425 is connected between inductor 3,423 second ends and the output end vo ut as unidirectional switch elements.In the present embodiment, the anode tap of diode 3425 is connected to the second end of inductor 3423, and the cathode terminal of diode 3425 is connected to the output end vo ut of power supply changeover device 342.Load capacitor 3427 is connected between output end vo ut and the ground.
When switch controller 3421 is in conducting state (on state), its switch terminal SW electrically conducts to ground, under this state, the commutating voltage that rectifier 340 produces charges to inductor 3423 via input Vin, thus with energy storage in inductor 3423.When switch controller 3421 is in off-state (off state), its switch terminal SW is electrically isolated with ground, under this state, inductor 3423 discharges via 3425 pairs of load capacitors 3427 of diode and solid-state light emitting element 344, thereby energy is transferred to load capacitor 3427 and solid-state light emitting element 344.
Fig. 5 B shows the coherent signal waveform of input commutating voltage Vin, output voltage V out and sense terminal electric current I ss.As shown in the figure, commutating voltage Vin can be current waveform in full-wave rectifier, and its crest value is Vp.When commutating voltage Vin reaches the operating voltage of switch controller 3421, such as graphic middle time t
0Shown trigger point, output voltage V out will be output and maintain the state that is higher than commutating voltage Vin.According to present embodiment, the output voltage V out of power supply changeover device 342 can be greater than the peak value Vp of input commutating voltage Vin, therefore, be the power end PW that output voltage V out is coupled to switch controller 3421 in the present embodiment, in order to be provided as the operating voltage of switch controller 3421.Therefore, do not have the upset operation situation that the conventional power source transducer produces because of the operating voltage deficiency.
Spirit of the present invention is the circuit design of power supply changeover device 342, make power supply changeover device 342 be exported and maintain the output voltage V out that is higher than commutating voltage peak value Vp by the detecting switching of switch controller 3421 and the annexation of other element, easy speech, switch controller is to can be the art tool to know that usually the knowledgeable knows the electronic circuit chip that can reach this detecting switching, including but not limited to the oscillator of deciding frequency or frequency conversion (OSC) or power-supply controller of electric (PWM IC)
Fig. 5 C shows behind power supply changeover device 342 beginning output voltage V out, the local waveform amplification of the electric current I ss of the sense terminal SS of switch controller 3421 wherein and voltage Vsw, the electric current I sw of switch terminal SW.Switch controller 3421 is pushed to the energy of solid-state light emitting element 344 by the size of sense terminal SS detecting commutating voltage Vin or electric current I ss in order to determine switch controller 3421.As shown in the figure, present embodiment is to use impulse wave width modulation (PWM) technology to regulate the electric current I sw of switch terminal SW, and it is along with sense terminal electric current I ss(Vin) energy corresponding to size output, and reach the effect of stablizing light modulation.And when can being understood that easily, although different switch controllers can produce output waveform and the frequency of different switch terminal voltage Vsw and electric current I sw, switch terminal electric current I sw still can be according to sense terminal Iss(Vin) energy corresponding to size output.
As from the foregoing, when the operating voltage of switch controller 3421 of the present invention is lower, even the output voltage waveforms of dimmer 32 is in the low output state of low pressure, switch controller 3421 still can produce enough Voltage-outputs and drive solid-state light emitting element 344, make solid-state light emitting element 344 maintain the state of glimmer, that is solid-state light emitting element 344 brightness will be corresponding to the adjustable extent of the voltage of dimmer 32 and do not glimmer.
The present invention is applicable to the power supply changeover device 342 that high-voltage solid-state light-emitting component 344 is developed, solid-state light emitting element 344 bear the peak value Vp that voltage can be commutating voltage; When the voltage (Vout) of the solid-state light emitting element 344 of suitably selecting a peak value Vp who is relatively higher than commutating voltage, can promote the efficient of switch controller 3421, lower energy loss and load at switch controller 3421 and inductor 3423.In addition, because the input commutating voltage Vin of the power supply changeover device 342 of present embodiment does not need pure stable DC voltage, so rectifier 340 no longer needs the capacitor of traditional high capacitance.The substitute is, present embodiment only need use the capacitor 3403 of little capacitance, and it is the usefulness of resisting electromagnetic interference (EMI), and is irrelevant with rectifying and wave-filtering; Perhaps, can omit capacitor 3403.And overall architecture of the present invention levels off to resistive, and voltage and electric current are under same phase, therefore can obtain higher power factor (PF).
Fig. 6 shows the thin section circuit diagram of the solid-state lighting device 34 of another embodiment of the present invention.Present embodiment (Fig. 6) is similar to last embodiment (Fig. 5 A), different places be the circuit of Fig. 5 A be with ground as shared node, the circuit of Fig. 6 then with power Vcc as shared node, the output that therefore can produce negative value.In the present embodiment, the cathode terminal of diode 3425 is connected to the second end of inductor 3423, and the anode tap of diode 3425 is connected to the output end vo ut of power supply changeover device 342.
Fig. 7 A shows the thin section circuit diagram of the solid-state lighting device 34 of further embodiment of this invention.Present embodiment (Fig. 7 A) is similar to the embodiment shown in Fig. 5 A, and different places are that present embodiment additionally inserts current-limiting protection device 3429 between solid-state light emitting element 344 and ground.When AC power 30 produces undesired large voltage (for example surging), the electric current that flows through solid-state light emitting element 344 can be restricted to a maximum amount definite value, be the voltage of solid-state light emitting element 344 according to W=V * I(V, I is this rated value, W is the consumed power of solid-state light emitting element 344), therefore can not allow the power of solid-state light emitting element 344 too high and burn out.
Fig. 7 B shows the thin section circuit diagram of the solid-state lighting device 34 of further embodiment of this invention.Present embodiment (Fig. 7 B) is similar to the embodiment shown in Fig. 7 A; different places are; present embodiment is between solid-state light emitting element 344 and ground; the extra variable restriction protective device 3430 that inserts; this variable restriction protective device 3430 is except the function that can have current-limiting protection device 3429 in the previous embodiment; and can when bearing too high voltages, feedback signal make switch controller 3421 adjust output, avoid the damage of variable restriction protective device 3430 to cause the further life-span that affects solid-state light emitting element 344.In better aspect, switch controller 3421 after the feedback signal of receiving variable restriction protective device 3430, the load cut-off current of capable of regulating variable restriction protective device 3430.
When being understood that easily, overvoltage current-limiting protection aspect also need not be restricted to particular aspect, and for example the protection form of overvoltage current limliting or average formula overvoltage current-limiting protection all can be applicable to the present invention in real time.
Power supply changeover device of the present invention mainly is design (Vp≤Vout=V that 344 series connection form high pressure for solid-state light emitting element
LED, V
LEDVoltage for light-emitting diode), only when the design of the above-mentioned tool variable restriction protective device 3430 of solid-state lighting device 34 employings, solid-state light emitting element 344 will be not limited to high pressure, and also to can be the low pressure aspect (be V
LED＜Vp).
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (14)
1. non-isolation suitching type booster power transducer is characterized in that it comprises:
Switch controller;
The energy storage element, its first end is connected to the input of this power supply changeover device, and the second end of this energy storage element is connected to the switch terminal of this switch controller;
Unidirectional switch elements is connected between the output of the second end of this energy storage element and this power supply changeover device; And
Load capacitor is connected between this output and the shared node;
Wherein when this switch controller was in conducting state, the switch terminal of this switch controller electrically conducted to this shared node, and this commutating voltage charges to this energy storage element via this input; When this switch controller was in off-state, it is electrically isolated that the switch terminal of this switch controller and this are shared node, and this energy storage element discharges to this solid-state light emitting element via this unidirectional switch elements.
2. power supply changeover device according to claim 1 is characterized in that this energy storage element comprises inductor.
3. power supply changeover device according to claim 1 is characterized in that this unidirectional switch elements comprises a diode.
4. power supply changeover device according to claim 1 is characterized in that this shared node is ground or power supply.
5. power supply changeover device according to claim 1 is characterized in that this switch controller comprises oscillator or the power-supply controller of electric of deciding frequency or the output of frequency conversion waveform.
6. power supply changeover device according to claim 1 is characterized in that this switch controller also comprises power end, is coupled to this output, with the operating voltage of this output voltage as this switch controller.
7. method that tunable optical solid-state lighting device direct voltage is provided is characterized in that it comprises to utilize power supply changeover device output dc voltage claimed in claim 1.
8. tunable optical solid-state lighting device is characterized in that it comprises:
Rectifier receives the output of dimmer and is converted into commutating voltage;
At least one solid-state light emitting element; And
Power supply changeover device as claimed in claim 1 receives this commutating voltage with output dc voltage, in order to offer this solid-state light emitting element.
9. solid-state lighting device according to claim 8 is characterized in that it also comprises capacitor, is connected between the output and shared node of this rectifier.
10. solid-state lighting device according to claim 8 is characterized in that it also comprises current-limiting protection device, places between this solid-state light emitting element and the shared node.
11. solid-state lighting device according to claim 10 is characterized in that this current-limiting protection device is the variable restriction protective device.
12. solid-state lighting device according to claim 10 is characterized in that this current-limiting protection device is instant current-limiting protection device or average formula current-limiting protection device.
13. according to claim 9 or 10 described solid-state lighting devices, it is characterized in that this shared node is ground or power supply.
14. solid-state lighting device according to claim 8 is characterized in that this solid-state light emitting element is light-emitting diode, Organic Light Emitting Diode or polymer LED.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100129675 | 2011-08-19 | ||
| TW100129675A TW201310879A (en) | 2011-08-19 | 2011-08-19 | Power converter and a dimmable solid-state lighting device with the power converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102958247A true CN102958247A (en) | 2013-03-06 |
Family
ID=47189700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102957314A Pending CN102958247A (en) | 2011-08-19 | 2012-08-17 | Power converter and dimmable solid-state lighting device applying same |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20130043800A1 (en) |
| EP (1) | EP2560461A2 (en) |
| CN (1) | CN102958247A (en) |
| TW (1) | TW201310879A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015180695A1 (en) * | 2014-12-29 | 2015-12-03 | 深圳市长昊机电有限公司 | Dc/dc boost conversion module and circuit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2846448B1 (en) * | 2013-09-06 | 2018-11-14 | Nxp B.V. | Switched capacitor power converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101720148A (en) * | 2009-07-21 | 2010-06-02 | 海洋王照明科技股份有限公司 | LED driving circuit and LED device |
| CN101835314A (en) * | 2010-05-19 | 2010-09-15 | 成都芯源系统有限公司 | LED drive circuit with dimming function and lamp |
| WO2010106723A1 (en) * | 2009-03-17 | 2010-09-23 | Ricoh Company, Ltd. | Semiconductor apparatus and method of controlling operation thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2730210C (en) * | 2004-03-15 | 2015-05-05 | Philips Solid-State Lighting Solutions, Inc. | Power control methods and apparatus |
| TW200816608A (en) * | 2006-09-26 | 2008-04-01 | Beyond Innovation Tech Co Ltd | DC/DC converter |
-
2011
- 2011-08-19 TW TW100129675A patent/TW201310879A/en unknown
-
2012
- 2012-08-17 CN CN2012102957314A patent/CN102958247A/en active Pending
- 2012-08-17 US US13/588,685 patent/US20130043800A1/en not_active Abandoned
- 2012-08-20 EP EP12181029A patent/EP2560461A2/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010106723A1 (en) * | 2009-03-17 | 2010-09-23 | Ricoh Company, Ltd. | Semiconductor apparatus and method of controlling operation thereof |
| CN101720148A (en) * | 2009-07-21 | 2010-06-02 | 海洋王照明科技股份有限公司 | LED driving circuit and LED device |
| CN101835314A (en) * | 2010-05-19 | 2010-09-15 | 成都芯源系统有限公司 | LED drive circuit with dimming function and lamp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015180695A1 (en) * | 2014-12-29 | 2015-12-03 | 深圳市长昊机电有限公司 | Dc/dc boost conversion module and circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2560461A2 (en) | 2013-02-20 |
| US20130043800A1 (en) | 2013-02-21 |
| TW201310879A (en) | 2013-03-01 |
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Application publication date: 20130306 |